Steam announces the return of X-COM: Terror from the Deep to the online
delivery service, as well as the addition of four other titles from the highly
regarded UFO strategy series, X-COM: Apocalypse, X-COM: Enforcer,
X-COM: Interceptor, and X-COM: UFO Defense. The games are
available separately for $4.99 USD each, or as part of their
X-COM collection for $14.99 USD. During this first week of availability,
they are offering an additional 10% off those prices.

I'm one of those gaming-deprived people that has never played an X-COM game. I might just pick up the collection, but I'm gonna do a bit more digging to be sure they all run on Vista 64 before I bite the bullet.